<template>
  <div class="panel-tab__content">
    <el-form label-width="70px" @submit.native.prevent size="small">
      <el-form-item label="参数说明">
        <el-button size="small" type="primary" @click="dialogVisible = true">查看</el-button>
      </el-form-item>
      <el-form-item label="回路特性">
        <el-select v-model="loopCharacteristics" @change="changeLoopCharacteristicsType">
          <!--bpmn:MultiInstanceLoopCharacteristics-->
          <el-option label="并行多重事件" value="ParallelMultiInstance" />
          <el-option label="时序多重事件" value="SequentialMultiInstance" />
          <!--bpmn:StandardLoopCharacteristics-->
          <el-option label="循环事件" value="StandardLoop" />
          <el-option label="无" value="Null" />
        </el-select>
      </el-form-item>
      <template v-if="loopCharacteristics === 'ParallelMultiInstance' || loopCharacteristics === 'SequentialMultiInstance'">
        <el-form-item label="循环基数" key="loopCardinality">
          <el-input v-model="loopInstanceForm.loopCardinality" clearable @change="updateLoopCardinality" />
        </el-form-item>
        <el-form-item label="集合" key="collection">
          <el-input v-model="loopInstanceForm.collection" clearable @change="updateLoopBase" />
        </el-form-item>
        <el-form-item label="元素变量" key="elementVariable">
          <el-input v-model="loopInstanceForm.elementVariable" clearable @change="updateLoopBase" />
        </el-form-item>
        <el-form-item label="完成条件" key="completionCondition">
          <el-input v-model="loopInstanceForm.completionCondition" clearable @change="updateLoopCondition" />
        </el-form-item>
        <el-form-item label="异步状态" key="async">
          <el-checkbox v-model="loopInstanceForm.asyncBefore" label="异步前" @change="updateLoopAsync('asyncBefore')" />
          <el-checkbox v-model="loopInstanceForm.asyncAfter" label="异步后" @change="updateLoopAsync('asyncAfter')" />
          <el-checkbox
              v-model="loopInstanceForm.exclusive"
              v-if="loopInstanceForm.asyncAfter || loopInstanceForm.asyncBefore"
              label="排除"
              @change="updateLoopAsync('exclusive')"
          />
        </el-form-item>
        <el-form-item label="重试周期" prop="timeCycle" v-if="loopInstanceForm.asyncAfter || loopInstanceForm.asyncBefore" key="timeCycle">
          <el-input v-model="loopInstanceForm.timeCycle" clearable @change="updateLoopTimeCycle" />
        </el-form-item>
      </template>
    </el-form>

  <!-- 参数说明 -->
  <el-dialog v-model="dialogVisible" title="多实例参数" width="680px" @closed="$emit('close')">
    <el-descriptions :column="1" border>
      <el-descriptions-item label="使用说明">按照BPMN2.0规范的要求，用于为每个实例创建执行的父执行，会提供下列变量:</el-descriptions-item>
      <el-descriptions-item label="collection(集合变量)">传入List参数, 一般为用户ID集合</el-descriptions-item>
      <el-descriptions-item label="elementVariable(元素变量)">List中单个参数的名称</el-descriptions-item>
      <el-descriptions-item label="loopCardinality(基数)">List循环次数</el-descriptions-item>
      <el-descriptions-item label="isSequential(串并行)">Parallel: 并行多实例，Sequential: 串行多实例</el-descriptions-item>
      <el-descriptions-item label="completionCondition(完成条件)">任务出口条件</el-descriptions-item>
      <el-descriptions-item label="nrOfInstances(实例总数)">实例总数</el-descriptions-item>
      <el-descriptions-item label="nrOfActiveInstances(未完成数)">当前活动的（即未完成的），实例数量。对于顺序多实例，这个值总为1</el-descriptions-item>
      <el-descriptions-item label="nrOfCompletedInstances(已完成数)">已完成的实例数量</el-descriptions-item>
      <el-descriptions-item label="loopCounter">给定实例在for-each循环中的index</el-descriptions-item>
    </el-descriptions>
  </el-dialog>
  </div>
</template>

<script setup>
import { ref, reactive, watch, inject, getCurrentInstance } from 'vue';
import { StrUtil } from '@/utils/StrUtil';

// 属性定义
const props = defineProps({
  id: {
    type: String,
    required: true
  }
});

// 事件定义
const emit = defineEmits(['close']);

// 注入modelerStore
// const modelerStore = inject('modelerStore');
const { proxy } = getCurrentInstance();
const modelerStore = proxy.modelerStore;

// 状态定义
const dialogVisible = ref(false);
const loopCharacteristics = ref("");
const loopInstanceForm = reactive({});
const multiLoopInstance = ref(null);

// 默认表单
const defaultLoopInstanceForm = {
  completionCondition: "",
  loopCardinality: "",
  extensionElements: [],
  asyncAfter: false,
  asyncBefore: false,
  exclusive: false
};

// 获取元素循环特性
const getElementLoop = (businessObject) => {
  if (!businessObject.loopCharacteristics) {
    loopCharacteristics.value = "Null";
    Object.keys(loopInstanceForm).forEach(key => {
      delete loopInstanceForm[key];
    });
    return;
  }
  
  if (businessObject.loopCharacteristics.$type === "bpmn:StandardLoopCharacteristics") {
    loopCharacteristics.value = "StandardLoop";
    Object.keys(loopInstanceForm).forEach(key => {
      delete loopInstanceForm[key];
    });
    return;
  }
  
  if (businessObject.loopCharacteristics.isSequential) {
    loopCharacteristics.value = "SequentialMultiInstance";
  } else {
    loopCharacteristics.value = "ParallelMultiInstance";
  }
  
  // 合并配置
  Object.assign(loopInstanceForm, 
    defaultLoopInstanceForm,
    businessObject.loopCharacteristics,
    {
      completionCondition: businessObject.loopCharacteristics?.completionCondition?.body ?? "",
      loopCardinality: businessObject.loopCharacteristics?.loopCardinality?.body ?? ""
    }
  );
  
  // 保留当前元素 businessObject 上的 loopCharacteristics 实例
  multiLoopInstance.value = modelerStore.element.businessObject.loopCharacteristics;
  
  // 更新表单
  if (
    businessObject.loopCharacteristics.extensionElements &&
    businessObject.loopCharacteristics.extensionElements.values &&
    businessObject.loopCharacteristics.extensionElements.values.length
  ) {
    loopInstanceForm.timeCycle = businessObject.loopCharacteristics.extensionElements.values[0].body;
  }
};

// 更改循环特性类型
const changeLoopCharacteristicsType = (type) => {
  // 切换类型取消原表单配置
  Object.assign(loopInstanceForm, defaultLoopInstanceForm);
  
  // 取消多实例配置
  if (type === "Null") {
    modelerStore.modeling.updateProperties(modelerStore.element, {loopCharacteristics: null});
    return;
  }
  
  // 配置循环
  if (type === "StandardLoop") {
    const loopCharacteristicsObject = modelerStore.moddle.create("bpmn:StandardLoopCharacteristics");
    modelerStore.modeling.updateProperties(modelerStore.element, {
      loopCharacteristics: loopCharacteristicsObject
    });
    multiLoopInstance.value = null;
    return;
  }
  
  // 时序
  if (type === "SequentialMultiInstance") {
    multiLoopInstance.value = modelerStore.moddle.create("bpmn:MultiInstanceLoopCharacteristics", {
      isSequential: true
    });
  } else {
    multiLoopInstance.value = modelerStore.moddle.create("bpmn:MultiInstanceLoopCharacteristics");
  }
  
  modelerStore.modeling.updateProperties(modelerStore.element, {
    loopCharacteristics: multiLoopInstance.value
  });
};

// 循环基数
const updateLoopCardinality = (cardinality) => {
  let loopCardinality = null;
  if (cardinality && cardinality.length) {
    loopCardinality = modelerStore.moddle.create("bpmn:FormalExpression", {body: cardinality});
  }
  modelerStore.modeling.updateModdleProperties(modelerStore.element, multiLoopInstance.value, {
    loopCardinality
  });
};

// 完成条件
const updateLoopCondition = (condition) => {
  let completionCondition = null;
  if (condition && condition.length) {
    completionCondition = modelerStore.moddle.create("bpmn:FormalExpression", {body: condition});
  }
  modelerStore.modeling.updateModdleProperties(modelerStore.element, multiLoopInstance.value, {
    completionCondition
  });
};

// 重试周期
const updateLoopTimeCycle = (timeCycle) => {
  const extensionElements = modelerStore.moddle.create("bpmn:ExtensionElements", {
    values: [
      modelerStore.moddle.create(`flowable:FailedJobRetryTimeCycle`, {
        body: timeCycle
      })
    ]
  });
  modelerStore.modeling.updateModdleProperties(modelerStore.element, multiLoopInstance.value, {
    extensionElements
  });
};

// 直接更新的基础信息
const updateLoopBase = () => {
  modelerStore.modeling.updateModdleProperties(modelerStore.element, multiLoopInstance.value, {
    collection: loopInstanceForm.collection || null,
    elementVariable: loopInstanceForm.elementVariable || null
  });
};

// 各异步状态
const updateLoopAsync = (key) => {
  const {asyncBefore, asyncAfter} = loopInstanceForm;
  let asyncAttr = Object.create(null);
  if (!asyncBefore && !asyncAfter) {
    loopInstanceForm.exclusive = false;
    asyncAttr = {asyncBefore: false, asyncAfter: false, exclusive: false, extensionElements: null};
  } else {
    asyncAttr[key] = loopInstanceForm[key];
  }
  modelerStore.modeling.updateModdleProperties(modelerStore.element, multiLoopInstance.value, asyncAttr);
};

// 监听ID变化
watch(() => props.id, (newVal) => {
  if (StrUtil.isNotBlank(newVal)) {
    getElementLoop(modelerStore.element.businessObject);
  }
}, { immediate: true });

</script>

<style lang="scss">
@import '../style/process-panel';
</style>

